the world is someone's oyster

Meanings

1. All opportunities are open to someone; the world is theirs.

Etymology

From the version of the play The Merry Wives of Windsor published in the First Folio (1623) of the works of the English playwright William Shakespeare (baptized 1564; died 1616): see the quotation. The original context was that Ancient Pistol would use force to obtain a loan from Sir John Falstaff, like prising open an oyster with a sword to obtain a pearl.